XML 42 R30.htm IDEA: XBRL DOCUMENT v3.8.0.1
Gas Reserves (Tables)
 3 Months Ended
Mar. 31, 2018
Gas Reserves [Abstract]  
Gas Reserves
The following table outlines our net gas reserves investment:
 
 
March 31,
 
December 31,
In thousands
 
2018
 
2017
 
2017
Gas reserves, current
 
$
15,124

 
$
15,378

 
$
15,704

Gas reserves, non-current
 
172,412

 
172,158

 
171,832

Less: Accumulated amortization
 
91,852

 
75,528

 
87,779

Total gas reserves(1)
 
95,684

 
112,008

 
99,757

Less: Deferred taxes on gas reserves
 
22,115

 
32,179

 
22,712

Net investment in gas reserves
 
$
73,569

 
$
79,829

 
$
77,045


(1)
Our net investment in additional wells included in total gas reserves was $5.6 million, $6.5 million and $5.8 million at March 31, 2018 and 2017 and December 31, 2017, respectively.